Chocolate-Peanut Butter Cake with Cream Cheese and Butterfinger Frosting

INGREDIENTS

• 1/2 cup old-fashioned (natural) chunky peanut butter
• Butterfinger candy bars, coarsely chopped
• 10 tablespoons (1 1/4 sticks) unsalted butter, room temperature
• 1/2 cup (packed) golden brown sugar
• 1/2 teaspoon salt
• 12 ounces bittersweet or semisweet chocolate, finely chopped
• 1 pound golden brown sugar
• 6 tablespoons (3/4 stick) unsalted butter, room temperature
• 1 teaspoon vanilla extract
• 2 1/4 cups heavy whipping cream
• Glazed peanuts
• 2 cups powdered sugar, divided
• 3/4 cup chilled heavy whipping cream
• 2 1/2 cups all purpose flour
• 1 teaspoon baking soda
• 1 cup buttermilk
• 1 teaspoon baking powder
• 1 1/2 8-ounce packages cream cheese, room temperature
• 4 large eggs